重氮甲烷 、 (6aR,6bS,8aS,12aS,12bS,14aR,14bS)-4a,6a,8a-Trimethyl-icosahydro-1-oxa-picen-2-one 在
potasse methanolique 作用下,
生成 3-((1S,2S,4aR,6aS,10aS,12aR)-1-Hydroxy-2,4a,6a-trimethyl-octadecahydro-chrysen-2-yl)-propionic acid methyl ester 、
3-((1S,2R,4aR,6aS,10aS,12aR)-1-Hydroxy-2,4a,6a-trimethyl-octadecahydro-chrysen-2-yl)-propionic acid methyl ester